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Finding the Fourth Proportional to 689,663.74, 951,593.36 and 403,128.40

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Solution

The fourth proportional to 689,663.74, 951,593.36 and 403,128.40 is: 556,233.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,663.74 : 951,593.36 = 403,128.40 : x
  2. Step 2: Convert to fraction form
    689,663.74/951,593.36 = 403,128.40/x
  3. Step 3: Cross multiply
    689,663.74x = 951,593.36 × 403,128.40
  4. Step 4: Simplify right side
    689,663.74x = 383,614,308,667.42
  5. Step 5: Solve for x
    x = 383,614,308,667.42/689,663.74
  6. Step 6: Final answer
    x = 556,233.84

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